TAMPA — It’s rare that the No. 4 and No. 5 spots in a pitching rotation are discussed as much in spring training as the Yankees’ will be discussed across the next six weeks.

Because it’s February, a time in the baseball calendar when clubs always view their mugs as half full, the Yankees have convinced themselves A.J. Burnett will rebound from a brutal 2010 season.

However, as pitchers and catchers report to George M. Steinbrenner Field today and prepare for their first workouts tomorrow, the Yankees can’t hide their concern about who will take those fourth and fifth slots.

“The back of the rotation is a question mark,” general manager Brian Cashman admitted yesterday. “I have to find out how big of a question mark. Do I feel I have to solve it or feel good about it? We have a lot of stuff coming.”

Would the Yankees trust the final two spots in the rotation to neophytes such as Manuel Banuelos, Dellin Betances, Adam Warren, Ivan Nova or Hector Noesi?

Probably not. But with Bartolo Colon, Freddy Garcia and Sergio Mitre the lukewarm alternatives, one of the youngsters could pitch well enough to grab a spot.

Burnett and the No. 4 and 5 starters will be watched closely. So will Joba Chamberlain. And catcher Russell Martin also is worth eyeballing as he rebounds from knee surgery and a hip injury and learns a new staff.

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Derek Jeter is scheduled to be at Steinbrenner Field today for an event that isn’t related to the Yankees. Jeter has been working out at the nearby minor league complex, but can’t work out at the major league venue until the full squad reports later this week.